Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaeaff5ab94501ef…

MALICIOUS

PDF

74.5 KB Created: 2021-09-04 14:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2599693a4e974439fca77f798c0f544d SHA-1: 86bf472c3d773c037bbf0c6c1c34b9708c1d0bed SHA-256: eaeaff5ab94501ef2885bb11d67b6215cdee020c9af9e6a06642d5e8d08c064d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest the primary goal is to redirect the user to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acd397ea102---93077150464.pdf In PDF document text
    • http://andlupa.com/userfiles/file/pegewetijemujoxufopuz.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607944cd7fb34---96810150952.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa1bb465f2---82310960956.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a63b80eb9ab---48598228081.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/kurumifekinumo.pdfIn PDF document text
    • http://focalthai.com/file_media/file_image/file/mokut.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/10ec6e531d08c4095c1882a352532b66/94094780736.pdfIn PDF document text
    • http://amandamaitland.com/images/file/81040466096.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c38c6580eb6---76722820974.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/519d37d1629b17bdef0ab06b8fe34efd/pekosonejitiwejopozufuved.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609eba587789b---wavavuvalonukatikuba.pdfIn PDF document text
    • https://www.medicalbi.com/ckfinder/userfiles/files/22519635538.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/56b109e2ebe71a54bec1ca6dfac562d8/wuwukujogifiliwurewi.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/41960775850.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160aafbb2b211d---nezifesupo.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed8f292b1c---38208090387.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97d04480a1---zepazeluduvivi.pdfIn PDF document text
    • https://peterdegendt.be/file/govudeso.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/26368929051.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/parirenebupazebixu.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/40400283124.pdfIn PDF document text
    • http://diencongnghiepvohoang.com/uploads/files/wolajaxu.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/xuwix.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e9912a3a0bb18abb59ecc106bb929e16/kodikoxadat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=overlord+light+novel+pdf+google+drivePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD5 10540 bytes
SHA-256: e88edacc1dba4005f082dfa3ac4d97e673afec1da230c838f1d62bf05342f275
font_01_sfnt_off0000d58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 18080 bytes
SHA-256: 7f60d21d9319b20654b11baf66894af53649ce22e748295340d3e7058d11520e